Hi The typical 8140 tap has an ADEV of around 2x10-11 at a tau of 1 second and is in the 3x10^-12 range at 100 seconds. That’s not super duper, but it’s plenty good enough for the intended use of feeding racks full of test gear. If you are feeding it with a typical Cs or telecom Rb, it’s about as good as the source you are feeding it with.
On the plus side, if you have an inventory of gear needs 100 KHz as a reference, just grab that tap. This other device needs 1 MHz, grab the tap. That one needs 5 MHz …. It’s tough to do that with other systems. Bob > On Jun 14, 2018, at 9:41 PM, Charles Steinmetz <[email protected]> wrote: > > Julien wrote: > >> I'm somewhat tempted to take the schematic and see if I can fit it in >> the comparatively tiny Pomona boxes > > Before getting too excited about the various 8140 module designs, it may be > worth reflecting that the performance of the 8140 system is mediocre at best > from a time-nuts perspective. There are lots and lots of much better designs > if you're building your own. Even something as simple as a modified video > distribution amplifier can be orders of magnitude better (see, e.g., > <http://www.ko4bb.com/getsimple/index.php?id=download&file=02_GPS_Timing/Extron_ADA_6_modifications_for_use_as_10MHz_distribution_amp_STEINMETZ.pdf>). > > The point of the 8140 system is that it is a moderate performance, "do > everything" solution for large installations (hundreds of potentially > multifrequency taps spaced around acres of facility), not a time-nuts-quality > distribution system for a facility the size of a residential home. > > Best regards, > > Charles > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://lists.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
